Carrier BB User's Manual
Contents
1. 1 TT 1 TF E 1 1 TF 1 SC INDOOR FAN DD Ve pd ee ee pe ae Adjustable Belt Driven Centrifugal 1750 Rpm Moto TTT Nominal Cfm 1200 2000 3000 4000 6000 Standard Fan Speed Range Rpm 512 782 647 915 495 700 600 850 568 720 Maximum Allowable Rpm 1100 1100 1100 1100 1100 No of Belts Fan Pulley PD in 1 64 1 64 1 85 1 70 1 114 Motor Pulley PDR in 19 29 24 34 24 34 24 34 37 47 Nom Std Frame Size i 1 3 48 3 4 56 1 56 2 145T 2 145T Alt Frame Size 3 4 56 1 56 2 145 3 182 3 182 Alt Frame Size 3 182T Ur 184T INDOOR COIL oa Copper Tubes Aluminum No of Rows Fins in 2 325 3 139 3 121 3 121 3 106 sq f ft 50 73 85 169 RETURN AIR FILTERS 1 io eg Factory Supplied Throwaway Type _ 4 16 20 1 3 16x25x2 No Size in 2 16 25 1 a See Note 4 3 20x25x2 CONDENSER CONNECTIONS BA Only E e ZR 2e in ES MO MUR Water Inlet Manifolded 1 2 FPT 3 4 FPT 1 FPT 1 FPT 2 Water Outlet Manifolded 1 2 FPT 3 4 FPT 1 FPT 1 2 REFRIGERANT CONNECTIONS BB Only Size in Type Suid Hot Gas Line 1 2 F1 1 2 F1 3 4 ODF 3 4 ODF 1 1 8 ODM ystem Liquid Line 1 2 F1 1 2 F1 5 8 ODF 5 8 ODF 5 8 ODM System 2 Hot Gas Line Liquid Line Hot Gas Line System Liquid Line E 2 6 zs CONDENSATE CONNECTIO2. 20 Water Cooled Condenser 20 Air Cooled Condenser 20 Charging the System 20 21 Return Air Grille Removal 21 Access Panel 22 Indoor Air Fan Motor Removal 22 Pressure Relief Devices 22 Crankcase 22 High and Low Pressurestats 22 Time Guard Control Circuit 22 INSTALLATION General 50 004 thru 024 units are self contained units arranged for vertical air discharge and wired and piped at the factory Size 50BA BB028 thru 064 units are self contained units consisting of a base section fan section fan motor and fan drive package each shipped separately and field assembled The base section consists of factory wired compressor evaporator coil unit The fan section can be mounted for vertical or horizontal air discharge Fig 1 gt Step 1 Receive and inspect unit Check unit against shipping order Inspect care fully for concealed shipping damage f shipment is damaged or incomplete file claim with transporta tion company and advise Carrier immediately gt Step 2 Protect units from damage To maintain warranty protect unit against ad verse weather theft or vandalism on jobsite UNITS 004 006 008 AND 012 PLENUM ACCESSORY
3. 250 oM pon rre 170 Ceea rum 9 50 55 60 65 70 75 80 85 COMPRESSOR SUCTION PRESSURE PSIG TEA Temperature Entering Air Fig 34 Charging Chart 50BB006 Access Panel Removal Size 004 012 units remove return air grille as described above Remove remaining grille side frame Remove the panel fastening screws now exposed TOP PANEL Pull out and down BOTTOM PANEL Pull out and up Indoor Air Fan Motor Removal CAUTION 50BA BB004 THRU 012 Motor power wires need not be disconnected from motor terminals before 1 motor is removed from unit 2 Loosen motor hoiddown bolts on mounting bracket so that fan belt can be removed 3 Loosen but do not remove the 2 motor mounting bracket bolts on left side of bracket 4 Slide motor bracket assembly to extreme right and lift out thru space between fan scroll and side frame Rest motor on a high platform such as a step ladder Do not allow motor to hang by its power wires Field Supplied Motors The factory installed mounting bracket for a 48 frame motor will not fit a 56 frame motor If replacing 48 frame motor with 56 frame motor use mounting bracket for 56 frame motor SOBA BBOI6 AND 024 Remove motor as follows l Remove unit access panel and cover of motor junction box Disconnect motor wires and remove conduit connection Remove motor base bolts and slide motor over so that fan belt can b
4. gt CON K E UNa P TAS M Ue pts 5 2 E FILTER ACCESS EACH END ACCESS AREA D AIRFLOW OPTIONAL TOP HORIZONTAL DISCHARGE For optional top mounted horizontal discharge use accessory filler panel package as shown See instal lation instructions in filler panel package Fig 1 Unit Dimensions 2 UNITS 50BA BB028 034 AND 044 NOTES 1 Certified dimension drawings available on FAN SECTION request POSITIONED 2 Water and refrigerant connections for Unit Sizes ROR VERTICAL 50BA BB016 thru 064 are located on right side of unit See Fig 16 for connection details AIR DISCH L SELECTOR SEE NOTE 2 FRONT OF UNIT UNITS 50BA BBO54 AND 064 LEFT SIDE OF UNIT SEE NOTE 2 ALTERNATE AIR DISCH SELECTOR SWITCH USES ACCESS AREA CONN ER A D AIRFLOW D lt FRONT OF UNIT Tig LIQUID LINE CONN du OR BACK 64 DIMENSIONS ft in p RUN ND TES mes UNIT poga gB 910 024 028 034 024 A 68 7 9 1 4 10 63 8 10 6 3 8 10 6 3 8 B 2 5 1 4 2 11 1 4 3 10 1 4 3 10 1 4 3 10 1 4 6 10 1 2 8 0 1 8 8 10 9 9 10 1 D 20 20 2 0 3 0 3 0 i 30 3 0 3 0 3 0 3 0 F 1 7 1 4 1 87 8 1 8 7781 1 8778 1 8 7 8 G 1 5 1 4 1 8 7 8 1 8 7 8 1 8 7 8 1 8 7 8 14 148 1 7 7 8 2 7 1 2 1 5 5 8 1 5 5 8 J O 1 5 8 O 2 3 8 0 3 0 3 0 3 K
5. 3 16x25x2 6 25x20x2 11 25 20 2 10 20x25x2 M M M tnt mM men ot 22 3 20x25x2 2 16x20x2 5 16x25x2 CONDENSER CONNECTIONS BA Only in Type Water Inlet Manifolded 2 1 2 1 1 2 2 Mater Outlet Manifolded 2 1 2 111 22 2 2 3 3 REFRIGERANT CONNECTIONS BB 3 3 2 2 3 System 1 Hot Gas Line 7 8 ODM 1 1 8 ODS 1 1 8 ODS 1 1 8 ODM 1 3 8 ODM Liquid Line 5 8 ODS 5 8 ODS 5 8 ODM 7 8 ODM System 2 Hot Gas Line 7 8 ODS 1 1 8 ODS 1 1 8 ODM 1 3 8 ODM Liquid Line 5 8 ODS 5 8 ODS 5 8 ODM 7 8 ODM System 3 Hot Gas Line 7 8 Liquid Line 5 8 MM aa 2 00 CONDENSATE CONNECTION Condensate Drain ACCESSORY HEATING COIL Size in 1 1 4 1 174 1 1 4 1 1 2 Hot Water Rows Fins in 2 14 2 14 2 113 2 113 2 113 Total Face Area sq ft 117 117 350 448 448 Steam Rows Fins in 1 14 1 14 1 10 1 10 1 10 01 Face Area sq ft 114 114 326 388 388 mes een aene nme p 55 HEATING COIL CONNECTIONS No Size in Hot Water nlet 2 1 172 3 1 1 2 3 1 4 2 3 1 1 2 Outlet 2 1 1 2 3 1 1 2 3 1 1 2 3 1 1 2 Steam Inlet 2 1 1 2 2 2 1 2 2 2 1 2 2 2 1 2 Outlet 2 11 4 2 1472 2 1 1 2 2 1 1 2 dad Padus Pipe Thread NOTES ME
6. 184 56 145T 68 012 1827 213 268 184 56 145T 94 dd 213 182T B4 1 184T 215 _ 84 1827 213 288 028 184T 215 28 8 034 254U 213T 7 1 298 256U 215T 1 298 C OMSLU p 71 2 101 cee un 40 101 um 064 254 290 Range of motor sizes unit will accept NOTE Motors drives other than those furnished with unit must be purchased locally Step 8 Align fan shaft and wheel HORIZONTAL WHEEL CENTERING wheels must be horizontally centered between the inside edges of their fan scroll venturis Fig 11 VENTURI TOP VIEW OF FAN SCROLL DIMENSION D MUST BE EQUAL ALL AROUND Fig 11 Horizontal Wheel Centering Adjust as follows Unit Sizes 50BA BB004 thru 024 1 Loosen setscrews holding wheel support to shaft Fig 12 2 Center the wheel by sliding it horizontally 3 Retighten setscrews Unit Sizes 50 028 thru 064 1 Loosen fan wheel locking clamps on each side of fan support Fig 12 2 Center the wheel by sliding it horizontally 3 Retighten locking clamp bolts to torque speci fied in Table 3 CUTOFF FASTENINGS DETAIL OF FAN WHEEL AND HOUSING HUB B ALLEN SETSCREW Fig 12 Fan Locking Detail Table 3 Torque Requirements FAN CLAMP BOLT te AMP BOLT BOLTSUE nJ RECOMMENDED TORQUE lb ft 5 16 15218 n d m CONCENTRIC ALIGNMENT Shaft and
7. ADD f COUPLING SUBCOOLER COUPLING WELDED TO NIPPLE ADD LENGTH NPT TUBE OF TUBE TO NO SUBCOOLER EXISTING 3 Remove shaded fittings gt 50BA044 units same less subcoolers 1 Use one out et for water discharge 2 Remove interconnecting nipples and dresser adapters on inlet side of condensers 3 Remove 3 in plugs from no 1 and 3 condenser inlet headers Fig 21 Field Conversion to City or Waste Water System 044 and 054 SUBCOOLERS 054 ONLY ALTERNATE SUPPLY SIDE CONN v ALTERNATE RETURN COMPRESSION FITTINGS Fig 22 Recirculating Water System Piping 50BA044 and 054 SUBCOOLERS 054 ONLY RETURN SUPPLY Fig 23 Waste or City Water System Piping 50BAO44 and 054 condensers individually gt 24 50BA064 Condenser Water Piping FAN SECTION COIL SECTION COMPRESSOR PANEL COMPRESSORS USED ON 044 054 ONLY COMPR NO 771 2 3 Fig 25 Refrigeration Circuits 016 064 p A Step 15 Install unit drain line Install a trapped condensate drain line at unit drain connection Fig 16 The drain requires standard pipe connected to condensate pan nipple as shown in Table 6 Figure 26 shows proper trap design Determine design negative static pressure This pressure is not the same as fan total pressure which includes pressure losses downstream as well as u
8. OUTSIDE AIR am OPENING OR ALTER NATE RETURN AIR OPENING SEE 2 VIEW A A 004 006 008 012 A LEFT SIDE OF UNIT FRONT OF UNIT 3 DIAM HOLE POWER SUPPLY 008 012 A A 1 FLOOR ALTERNATE RETURN AIR OR OUTDOOR AIR INLET DIMENSIONS ft in UNIT j 008 098 112 3 2 5 16 4 0 1 10 7 8 2 6 1 8 TOU HE 04 E 6 5 See Note 2 vo EE DUM F 1 1 13 16 1 4 7 16 1 7 378 G 1 1 1 8 1 3 1 5 1 4 0 3 4 0 1 1 4 J 1 0 1 2 0 10 5 8 0 11 7 8 K 1 9 1 8 1711 174 L 2 9 5 8 2 5 3 8 M 2 7 7 8 3 6 N 0 2 0 3 0 10 1 0 1 2 1 3 16 1 4 NOTES 1 Certified dimension drawings available upon request 2 Minimum required clearance at back and right side of unit is zero Clearance above and at left of unit depends on space required for accessory plenum ductwork con denser piping accessory heater piping condensate drain line power wiring and access to unit control center Clearance required at front of unit for service access and free return airflow is 2 feet 3 Water and refrigerant connections for Unit Sizes 5OBA BBOOA thru O12 are located on the left side of unit See Fig 16 for connection details UNITS 50BA BBO16 AND 024 FOR REAR DISCHARGE INTERCHANGE FAN SECTION WITH UPPER REAR PANEL pu HORIZONTAL DISCHARGE FRONT OF UNIT Pa
9. SUPPLY Lor FIELD WIRING FACTORY WIRING rmm 50BA 064 NOTE Field power wiring connections on 004 and 006 unit sizes are attached to factory wiring using factory supplied wire connectors Fig 27 Field Power Wiring Connections 008 064 TO OUTDOOR FAN MOTOR 4 cim Gum B BEN n E L 3 Mee E LU iom l Ter L_ 5 4 Loe a2 B sp 5 I NOTE 1 50BA BBOO8 Ol2 50BA BBOIS 50BA BBO24 50BA BBO28 034 TB2 TB2 TCI 6 05 2 50BA BB064 IFC 50BA BB044 054 CR Control Relay NOTES IFC Indoor Fan Contactor 4 Condenser Fan Relay OFR shipped with 50BB008 and 012 units J Jumper 2 Condenser Fan Relay contacts integral to control circuit with OFR Outdoor Fan Motor Relay and 006 units R Condenser Fan Relay 50BB Pump Relay 50BA 3 No provisions for pump relay connection on 50BA004 and 006 units TorTC Thermostat TB Terminal Board Fig 28 Field Control Wiring Connections 17 Refer to Fig 28 for field control wiring to pump relay 50BA unit condenser fan relay 50BB unit and remote thermostat unit sizes 016 thru 064 On 50BA BB004 thru 012 units the thermostat is factory installed with a sensing bulb in the return air To wire these units to a remote thermostat or to a remote control switch and thermostat refer to unit Wiring book or contact your Carrier
10. 1 7 1 4 2 2 5 8 2 174 1 2 174 L 3 2 1 4 3 10 4 9 4 9 M 1 8 2 1 1 8 2 2 1 2 2 2 1 2 2 6 1 8_ s 7 4 1 4 10 10 0 10 0 P 4 4 578 5 4 1 8 6 4 5 8 6 4 5 8 6 4 5 8 Q 4 11 1 2 5 7 1 4 6 3 5 8 7 7 1 4 7 7 1 4 Fig 1 Unit Dimensions cont 3 Table 1 Physical Data Step 3 Provide unit support Refer to Fig 1 Dimensions and Table 1 Physical Data for unit size and weight Construct a stand or frame of I beams or angle iron that supports unit adequately if desired The floor and floor joists of existing buildings may require reinforcement follow applicable codes Step 4 Rig and place unit Provide space around unit for service filter access and overhead clearance as indicated in Fig 1 Move and store unit in upright position 8 MODEL 50 om aur NE BB xd LAU M Uis NC HMM OPERATING WEIGHT 165 zii E Base Unit 710 mm i 890 1414 1221 Discharge Plenum 222 _ 140 1490 OPERATING CHARGE lbs Refrigerant 22 System 1 35 46 25 7 System 2 System 3 a m ME COMPRESSOR TYPE 06 Welded Hermetic 3450 Rpm Hen Hermetic 1750 Rpm System 1 M34 M34 P53 P67 P77 DA818 08724 DB824 DD337 DD537 System 2 e System 3 Ene No of Unloading Cylinders O 2 2 No of Capacity Steps 1 1 2 2 CONDENSER BA Only 9
11. 1 8 7 8 7 8 1 3 8 2 578 7 8 5 8 7 8 5 8 1 1 8 7 8 1 1 8 1 5 8 1 1 8 5 8 1 1 8 7 8 7 8 1 3 8 5 8 7 8 5 8 7 8 5 8 7 8 1 1 8 5 8 1 1 8 5 8 1 1 8 7 8 1 7 8 1 3 8 15 8 1 1 8 5 8 1 1 8 7 8 7 8 1 3 8 5 8 7 8 5 8 7 8 5 8 7 8 1 1 8 5 8 1 1 8 5 8 1 1 8 7 8 7 8 1 3 8 7 78 7 8 1 5 8 7 8 1 378 7 8 1 3 8 7 8 1 Mp eX m VUE DUSCHE HORE MER L Liquid Line OD Sweat connections SAE FLARE LIQUID IN T SAE FLARE 2 3 FPT CONDENSATE DRAIN 5 WATER OUT WATER IN 5 LEFT END TEN med VIEW 50BB004 006 Gee 5 Fig 16 Water Refrigerant Connections 12 I DIA KOFOR 5 ODF LIQUID LINE 5 BBOO4 THRU 012 UNITS I DIA HOLE FOR 2 FPT WATER OUTLET CONDENSATE DRAIN CONN 2 DIA HOLES FOR COND WATER OUTLET BA CONN OR 2 ODF HOT GAS 2427 LINE BB 81 8 2 DIA HOLE Ig FOR COND 2 1 WATER INLET 8 5 WATER BA CONN INLET LEFT END 5 ET OBAOI6 50BA BBOO8 012 1 7 8 ODM HOT 2 2 DRAIN CONN GAS WATER OUTLET F PIPE 4 3 4 21 2 47 PLUG WATER INLET gt qe 5 S ODM ER LIQ LINE CONDENSATE 3 CONN 4 62 CONN 50BA024 50BB024 CONN ODS 2 FPT WATER OUTLET 1 005 CONN 028 u 034 Fp 2 FPT WATER 5 2 005 LIQ LINE CONN 0
12. 208 230 3 60 71 50 460 3 60 16 25 575 3 60 22121 25 208 230 3 60 1 40 70 008 460 3 60 1 16 30 575 3 60 1 1 4 25 208 230 3 60 2 60 90 012 460 3 60 2 28 40 575 3 60 2 223 2 25 35 208 230 3 60 2 70 150 016 460 3 60 2 31 50 575 3 60 2 25 35 208 230 3 60 3 92 150 024 460 3 60 3 46 60 575 3 60 3 34 45 208 230 3 60 162 150 1200 028 460 3 60 66 601 70 575 3 60 a 5 6 45 70 208 230 3 60 16 2 175 200 034 460 3 60 66 60 80 575 3 60 256 5 50 80 208 230 3 60 7 1 2 216 2110 200 250 044 460 3 60 95 90 110 575 3 60 84 80 ee 208 230 3 60 280 236 0 225 300 0543 460 3 60 130 100 125 575 3 60 105 80 1 208 230 3 60 46 2 3140 350 400 gt 064 460 3 60 210 175 175 575 3 60 164 125 175 ji FLA Full Load Amps NOTES Hp Horsepower 1 In compliance with NEC requirements for multimotor and combination LRA Locked Rotor Amps load equipment NEC Articles 430 and 440 the overcurrent protective MOCP Maximum Overcurrent Protective Device See Note 1 device for the unit shall be fuse only RLA Rated Load Amps 2 Phase imbalance must not exceed 2 Fan motor power wiring circuit breakers and other electrical components are sized to accommodate special motors on the 50BA BBO16 024 028 Indoor fan motors are 3 phase motors of same voltage as unit except those and 034 units with FLA values in italics These motors are single phase motors of same 4 Wire sizing amps are a sum of 125 o
13. SECTION NOTE Motor pulley on left side of unit vertical discharge Motor pulley on right side of unit horizontal discharge Fig 4 Fan and Motor Arrangements 50BA BB028 034 044 054 064 REAR HORIZONTAL FAN AND VERTICAL FAN DISCHARGE 50BA BB 028 034 044 054 AND 064 MOTOR MOUNTING BRACKETS INSTALL AFTER MOUNTING FAN SECTION FAN SECTION FAN SECTION FRONT OF UNIT BASE UNIT COMPRESSOR NO MOTOR MOUNTING SECTION BRACKET USED WITH 044 SIZE UNIT THREE FANS ON 054 AND 064 UNITS REAR PANEL FAN SECTION Fig 5 Fan Section Mounting 50BA BB028 064 5 Replace panels as follows a Rear coil section panel on top of coil section Rear holes will overlap fan section top panel Fasten using hole vacated in Step lc see Fig 5 b All end panels NOTE On Size 044 units motor mounting channels are factory installed and no angles plates or fasteners are necessary In this position the fan motor is located on right side within fan section To set up Sizes 50 028 thru 064 for vertical air discharge Fig 4 and 5 1 Remove Front rear and end panels of fan section Upper rear and end panels of coil section Filters from coil section Fasteners holding filter frame top Push frame out and away from coil section frame on 028 and 034 units only 2 Lift up and position fan section on coil section Fig 5 3 Fasten fan section frame to coil section frame w
14. Yon 1 Step 1 Receive and inspect unit 1 Step 2 Protect units from damage Step Provide unit support 4 Step 4 Rig and place unit 4 Step 5 Install accessory plenum if supplied c E 7 Step 6 Position fan section as desired 7 8 Step 7 Install fan motor 9 Step 8 Align fan shaft and wheel 10 11 Step 9 Instali heating coil if supplied 11 Step 10 Install supply air evaporator ductwork Carrier Corporation 1981 Page Step 11 Install return air ductwork 004 012 units 11 Step 12 Check return air filters 11 Step 13 Check compressor spring 11 Step 14 Make condenser 11 14 Step 15 Install unit drain line 15 Step 16 electrical connections 16 18 STAR PU Ries tcc ctr Dh ce Dolo qe coe ees 18 Unit Size 50BA BBOO4 006 18 Unit Size thru 064 18 Service 18 Capacity Control Valve Adjustment 18 SERVICE Eee eR ou xs 19 Indoor Air Fan Adjustment 19 Lubrication 20 Return Air 20 Condensate Drains 20 Evaporator
15. in a cloth bag tied to the compressor Remove the compressor hold down bolts Then install the neoprene grommets between the compressor feet and the special washers Reinstall the hold down bolts and tighten until there is slight pressure on the grommets The compressors have reversible oil pumps that operate in either direction therefore the direction of rotation need not be checked NOTE Do not loosen bolts 50 008 compressor Step 14 Make condenser connections WATER COOLED 50BA UNITS GENERAL Condensers have water inlet and outlet connec tions as shown in Fig 16 Piping arrangements for city waste or recirculating water are shown in Fig 17 thru 24 WATER COOLED UNITS SIZE 50BA004 THRU 012 Connect condenser water supply and return lines as indicated in Fig 16 and 17 When connecting water lines hold the condenser inlet and outlet stubs firmly with wrench at the hex fitting to prevent twisting Do not use water lines smaller than connection sizes shown in Fig 17 Observe all applicable plumbing and sanitary codes To assemble Carrier Compatible Fittings Cut tubing to length with tube cutter and remove burrs 2 Mark required insertion depth on tube 1 1 4 in for 5 8 and 3 4 in OD tubing 3 Remove plug from fitting and loosen nut one turn 4 Position and insert tube into fitting Bottom tube past depth mark 5 Leave nuts on condenser end of tubing Loosen and p
16. must be run separately E unit 1s being serviced POWER WIRING Conduit opening for 50BA On 5 016 thru 064 size units power may BB004 thru 012 units is on left side of unit near be supplied thru a branch circuit Branch circuit control box for SOBA BB016 thru 064 units the protection is provided in these units by manual reset opening is on back of unit near control box L On 50 004 and 006 units field power wires are spliced to factory wires at the compressor contactor On all other sizes field power connec tions are made at a terminal block within the control box see Fig 27 Refer to Table 8 for maximum wire size at terminal block Supply voltage must be in accordance with name plate voltage On 3 phase units voltage between phases must be balanced within 2 and current within 10 with compressor running Contact your local power company for correction of improper voltage or phase imbalance see Table 7 Failure of unit because of phase imbalance constitutes abuse and can void the warranty CONTROL WIRING On extended voltage 208 230 v units Sizes 50 006 thru 064 the control transformer is factory wired for 208 v usage If unit is to be used on 230 system reconnect pri mary wiring on transformer as shown on unit wiring diagram TB OFR TB E 3 9 48 FIELD POWER SUPPLY FIELD POWER SUPPLY 5 BBOO8 012 50BA BBOI6 054 TB3 FIELD om POWER 12
17. return air or outdoor air inlet opening as indicated in Fig 1 l Cut out the alternate return air opening as required 2 Attach a l in flange to unit back panel or attach a flanged flexible duct connection directly to unit as desired If an outdoor makeup air damper is to be in stalled attach it directly to unit back panel and install flexible connection between damper assembly and remaining ductwork Use accepted ductwork installation procedures Follow all applicable codes 3 Restrict or completely blank off the standard return air opening with a field fabricated filler panel This panel must be removable for service access Refer to Service section entitled Return Air Grille Removal as required Step 12 Check return air filters Be sure filters shipped with unit are the correct size see Table 1 Never operate unit without return air filters in place Step 13 Check compressor spring mounts 50 008 and 50 012 thru 064 The compressors are held rigid in shipment by bolts extending thru a washer grommet and com pressor foot into a weld nut for 064 unit see para graph below Loosen each bolt 4 per compressor until com pressor floats freely on springs Then retighten bolts until there is slight pressure on the neoprene gasket This will steady the compressor and prevent start and stop rocking The 50 064 units are shipped with 4 special flanged washers and neoprene grommets
18. to 22 psig see Table 10 Table 10 Factory Set Points psig _ gen UNDER e XC X 296 j owe __ ue lel X q TO REGULATE CONTROL SET POINT 1 Turn adjustment nut Fig 29 clockwise to its bottom stop Set point is now 85 psig 2 Turn adjustment nut counterclockwise to reach desired pressure Each full turn decreases the set point by 7 5 psig Approximately 1 1 2counter clockwise turns decreases set point to 0 psig CONTROL SET POINT ADJUSTMENT NUT VALVE BODY PRESSURE DIFFERENTIAL ADJUSTMENT SCREW BYPASS PISTON RING BYPASS PISTON DIFFERENTIAL SCREW SEALING CAP REPLACE CAP TO PREVENT REFRIGERANT LEAKAGE Fig 29 Capacity Control Valve TO ADJUST PRESSURE DIFFERENTIAL Turn differential adjustment screw Fig 29 counterclockwise to its back stop position Differ ential is now 6 psig Then turn screw clockwise to desired differential Each full turn increases differential by 1 6 psig Approximately 10 clockwise turns increases differential to 22 psig SERVICE Indoor Air Fan Adjustment Observe fan com partment CAUTION note above The fan motor pulleys are factory set at the fan speeds listed in Table I Unit Sizes 50BA BB044 054 064 have fixed pulleys 2 PAN SPEED 034 2 jan belt Pd fan motor from mounting bracket Do not loosen fan motor mounting bracket from unit 3 Loo
19. wheels must be concentrically centered with the venturi or air inlet of the fan housing Fig 13 CENTER OF SHAFT AND WHEEL MUST BE THE SAME AS VENTURI CUTOFF FASTENINGS CUTOFF CUTOFF CLEARANCE 044 054 E 064 ONLY UL 7 FAN SCROLL OR HOUSING FAN CLAMP BOLTS SHAFT Fig 13 Concentric Alignment Unit Sizes 59 004 thru 024 Shaft bearings are supported by spider Fig 14 If shaft and wheels are concentrically misaligned from shipping shock it is possible to rebend spider arms to original posi tions Replace the spider if it has been extensively damaged by shipping shock Fig 14 Fan Shaft Bearings 004 006 008 012 016 024 arco s EN ae atlas e tms 1 Unit Sizes 50BA028 thru 064 Bearings are bolted to an angle support fastened to fan scroll Fig 15 To correct shaft and wheel concentric misalignment 1 Loosen bearing support bolts and shim or move as required 2 Retighten bearing support bolts HORIZONTAL SHAFT ALIGNMENT All units If the shaft has moved and all wheels are off horizontal center recenter the shaft as follows I Loosen the setscrews holding bearing locking collar at each end of shaft Fig 14 or 15 2 Slide shaft and wheel assembly horizontally until wheels are horizontally centered Fig 11 3 Slide the bearing locking collars against the bear ing race and turn in direction of shaft rotatio
20. 28 034 SYSTEM I SYSTEM 2 Iz MPT SYSTEM 3 CONDENSATE DISCH SE 3 MPT WATER 508 054 ONLY THREE 102 Ig ODM 5088044 ONLY SB 21 5084064 3 5 RIGHT EE 50BB044 054 MOUNTING HOLES END VIEW SEE FIGI NOTE ALL VIEWS ARE RIGHT END VIEWS EXCEPT AS INDICATED dis SUN ee CONDENSATE DRAIN CONN 5 8 ODM LIQUID LINE CONN 50BBOI6 d FPT WATER INLET n FPT 2 FPT WATER WATER OUTLET OUTLET 8 FLOOR 18 LINE RIGHT END VIEW 50 BAO28 SUBCOOLERS 054 ONLY 4 MOUNTING HOLES 50BA044 054 I MPT CONDEN SATE DRAIN FOR LIQ LINES 3 FRONT 12 ODM HOT OR BACK GAS CONN 50BBO64 Fig 16 Water and Refrigerant Connections cont 13 ALL SOBB AIR COOLED UNITS Install air cooled condenser in accordance with the installation instructions provided with condenser Connection locations for liquid and hot gas service lines are shown in Fig 16 Recommended line sizes are given in Table 5 Refer to Carrier System Design Manual Part 3 for standard refrigerant piping techniques Condenserless 50 units are shipped with a holding charge After refrigerant connections are made evacuate leak test and charge system as REFRIGERANT IN 50BA004 50BA006 50BA008 012 1 2 Conn 3 4 in Conn 1 in Conn WATER OUT H CONNECT TO LIQUID SERVICE SE VALVE GAG
21. 64 unit and on all 50BB units leave unit in this condition for 24 hours so that crankcase heater can drive off any accumulated refrigerant 4 Turn selector switch to COOL Time Guard circuit will delay unit start for 5 to 6 minutes 5 Set thermostat at desired comfort temperature TO SHUT DOWN UNIT 1 If unit may be exposed to freezing temperatures drain water from condenser and all water piping 2 Add a noncorrosive antifreeze to any residual water in the system 3 Turn selector switch to OFF position and turn circuit breakers off 4 f unit is to be used for winter heating leave circuit breakers on set selector switch at FAN position and turn cooling thermostat off Service Valves Always be sure that compressor suction and discharge service valves and liquid shutoff valves are open before operating unit The liquid shutoff valves are accessible from the rear of Size 064 unit and from front or rear of all other units To open valve turn counterclockwise backseat After opening replace and tighten valve cap to prevent leakage Capacity Control Valve Adjustment Fig 29 The capacity control valves are factory set as indi cated in Table 10 If valve adjustment is required for any reason use the following procedures The control set point cylinder load point is adjustable from 0 psig to 85 psig The pressure differential between the cylinder load point and cylinder unload point is adjustable from 6 psig
22. E PORT WATER 2 tt t WATER WATER r Z REGULATING VALVE VALVE gt Fig 17 Condenser Water Piping 50BA004 012 fo PIPE NIPPLE ju PLUG x DRESSER MALE ADAPTER REMOVE PLUG THESE ENDS PIPE PLUG tin REMOVE SHADED FITTINGS Fig 18 50BAO24 Condenser City Water Piping Conversion INTERCONNECTING WATER OUTLET PIPING CONDENSER NO 2 WATER OUT TO OPEN Pd DRAIN CONDENSER NO I WATER REGULATING VALVES PLUGGED 2 TEE od BLOWOUT CAP DRAIN CONNECT WATER VALVE CAPILLARY TO LIQUID LINE VALVE WATER IN STRAINER REDUCER DM WATER IN Fig 19 50BA024 Typical Waste or City Water Piping STOP VALVE described in the Service section entitled Charging the System Unit refrigerant operating charge is listed in Table 1 5 COND ALTERNATE WITH 10 COND BELOW FOR 5 4 WATER OUT 0 COND FOR 50BA028 IN CAPILLARY ee TO LIQUID SERVICE VALVE STRAINER SHUTOF F OR CITY WATER SYSTEM INLET FOR RECIRCULATING SYSTEM gt Fig 20 50BAO28 034 Condenser Water Piping y EROM NO 3 Mes NO2 ORESSER FROM NO I al Es SUBCOOLER SUBCOOLER NO 3 CONDENSER NO 2 CONDENSER NO 1 CONDENSER Y NO 5 SUBCOOLER i 14 NPT PLUG CUT TUBE HERE TO NO 2 IE NPT TO 3 NPT BUSHING
23. Gage connections 50BB Water Cooled Condenser 50BA d d ad L Fig 2 Base Unit Interior Details 004 006 008 and 012 6 LEGEND FOR o 50BAO24 UNIT Indoor Air Fan Selector Switch Return Air Filters Evaporator Coil Control Box Compressor No 1 Compressor No 2 Condensers 3 6 Fig 3 Base Unit Interior Details BOBAO24 Unit Shown Step 5 Install accessory plenum if supplied On unit Sizes 004 thru 024 holes in the unit top panel match holes in plenum Use screws shipped in cloth bag taped inside plenum to attach plenum to unit top See Fig and 2 Step 6 Position fan section as desired UNIT SIZES 50BA BB004 THRU 024 are shipped for vertical discharge To set up these units for hori zontal discharge separately purchased accessory filler panels must be field installed see Fig 1 To set up unit Sizes 50 016 and 024 for backmounted horizontal discharge Fig 1 proceed as follows l Remove a Rear fan section panel b Upper rear coil section panel c Power connections from indoor fan motor d Corner bolts holding fan section to coil section 2 Remove fan section and rotate it 180 lengthwise so that motor is on left side of unit 3 Place fan section on rear of coil section and refasten 4 Replace indoor fan
24. Mob uec OPERATING CHARGE ibs epe ET Wo H Refrigerant 22 Seem 24 15 24 15 24 15 29 15 52 25 System 3 17 12 24 15 24 15 29 15 52 25 17 11 29 15 COMPRESSOR TYPE 06 irs System 1 Serviceable Hermetic 1750 Rpm S deno DA724 DA824 DA337 DA537 DA337 DA537 DA337 DA537 DA337 DA537 275 275 27225 DA7241 DA824 DA724 DA824 DA337 DA537 DA337 DA537 DA337 DA537 E5275 E5275 Y DA724 DA824 DA337 DA537 No of Unloading Cylinders No of Capacity Steps iade ne CONDENSER BA Only No Type ANI P ML cca Lo INDOOR FAN Nominal Cfm Standard Fen Soasi 8000 10 000 12 000 16 000 20 000 24 000 AN 121004 700 875 605 750 685 845 627 672 717 650 695 762 785 828 895 ye pm 1100 1100 1100 1100 1100 1100 Motor Pulle PoR ulley PD 2 100 2 124 2 110 2 154 2 154 2 154 ak SA a fin 40 50 43 53 43 53 56 6 0 64 586268 707480 td Frame Size 182T 5 184T 5 184T 7 1 2 213 10 21571 15 254 Alt Frame Size 5 182T 7 1 2 213 7 1 2 213T 10 215T 15 254T Alt Frame Size 10 215T 10 215T ES INDOOR COIL Un No of Rows Fins in Total Face Area sq ft RETURN AIR FILTERS NES Eu No Size in Copper Tubes Aluminum Fins 4 106 4 89 4 89 490 490 4 106 180 226 269 365 46 3 46 3 Factory Supplied Throwaway
25. N UL Size in Type eco Condensate D Drain 3 4 3 4 FPT 3 4 4 E 1 FPT ACCESSORY HEATING COIL 74 i T Hot Water Rows 1 15 1 15 2 14 2 14 2 113 Total Face Area sq ft 50 50 60 60 157 Ste Rows Fins in 1 14 1 14 1 14 ue Total Face Area sq ft 5 m 69 69 144 HEATING COILS CONNECTIONS No Size in MPT Hot Water Inlet 1 7 8 1 7 8 1 1 1 4 1 1 1 4 2 1 1 2 Outlet i 1 7 8 1 7 8 1 1 1 4 1 1 1 4 2 1 1 2 Stea inlet 1 7 8 i 1 7 8 1 1 1 4 1 1 1 4 1 1 1 4 m Outlet 1 7 8 A 1 7 8 1 1 174 1 1 1 4 1 1 1 4 opa 50BA BB004 AND 006 Use rollers under ship ping rails Unit may be moved by hand truck on any side Do not remove shipping rails until unit is in final position 50BA008 TH RU 064 Use slings with spacer under base skid to prevent panel damage when using hoist Raise base skid on blocks and remove bolts On 028 thru 064 units unbolt fan section from skid Units as shipped are adequately dampened against vibration If additional dampening is de sired place sponge rubber rubber mat or fiberglass roof insulation between floor and base of unit or install vibration isolators MODEL 50 BA Ba 028 034 OPERATING WEIGHT Ibs Base Unit 1894 1464 2491 2397 2598 2430 3800 3100 4100 3300 4404 3550 Discharge Plenum 140 _ cr Mis adde
26. Number One Air Conditioning Maker Division of Carrier Corporation Carrier Parkway 4 Syracuse N Y 13221 SAFETY CONSIDERATIONS The 50BA BB Single Package Cooling Units are designed to provide safe and reliable service when operated within design specifications However due to system pressures electrical components and equipment location some aspects of installation start up and servicing of this equipment can be hazardous Only trained qualified installers and service mechanics should install start up and service this equipment When working on the equipment observe all pre cautions on tags or labels attached to the unit safety notes in the literature and any other safety precautions that apply Follow all safety codes Wear safety glasses and work gloves Use care in handling rigging and placing bulky equipment DANGER NEVER reach into unit while fan is running LOCK OPEN AND fan motor power dis connect before working on a fan Remove the fuses and take them with you after noting this on tag WARNING CHECK assembly and component weights to be sure rigging equipment can handle them safely Note also any specific rigging instructions WHEN STEAM CLEANING COILS be sure area is clear of personnel CONTENTS Page SAFETY CONSIDERATIONS l INSTALLATION 1 18 General ter SR REX
27. T E Fige 1 has serviceable hermetic 1750 rpm compressor PD P e ipe Thread 2 Operating charge for 50BB units does not include charge for remote air Pitch Diameter cooled condenser or connecting pipe All 50BB units are shipped with a holding charge Operating charge values are approximate See installa tion instructions Fan motor pulleys on 50BA BBO44 054 and O64 are fixed pitch type Field supplied 2 in filters will fit Motors anddrives other than those furnished with unit mustbe purchased locally Installation may require field modification Contact your local Carrier representative PDR Pitch Diameter Ran ge SC Shell and Coil ST Shell and Tube TT Tube in Tube DANGER SHARP CORNERS SEE DISCUSSION OF INDOOR SERVICE VALVE DETAILS 50BB BASE UNIT GENERAL VIEW Accessory Plenum Selector Switch and Thermostat Thermostatic Expansion Valve Indoor Air Fan Indoor Air Fan Motor Indoor Air Fan Motor Mounting Bracket Evaporator Thermostat Sensing Bulb Return Air Filter Refrigerant Filter Drier Water Regulating Valve Fitting on Refrigerant Liquid Line Low Pressure Cutout Switch 50BA BBO06 only Suction Pressure Gage Connection 16 4 Compressor Discharge Pressure Gage Connection 5 COMPRESSOR COMPARTMENT Control Box Service Valves Suction and Discharge with
28. The opened fitting allows refrigerant pressure to act on water regulating valve Tighten flare nut to prevent leakage The fitting automatically seals closes when flare nut is removed a slight amount of refrigerant is lost each time however Do not lose cotter pin WATER COOLED UNITS SIZE 016 THRU 064 Connect condenser water supply and return lines as indicated in Fig 16 Unit Size 50BA024 044 054 and 064 require field modification to condenser piping when used on city or waste water Refer to Fig 18 21 and 24 Install a water regulating valve on the inlet of each condenser with any size unit used on waste or city water Fig 19 20 22 23 and 24 Connect regulating valve capillary to a back seated liquid service valve Arrow on valve body must point in direction of liquid flow After connecting capillary open regulating valve one turn from back seated position Adjust valve to maintain proper condensing temperature Install a full size gate valve and strainer in water supply line Valve and strainer must be accessible See Table 4 Table 5 Recommended Line Sizes in Condenserless Models Conn LENGTH OF LINE SYSTEM 512 5 20 40 60 80 L L HG L HG L ato Ale Uo eta SRS ce E UTE MeL si maet eaa 172 172 172 172 v2 5 11 2 172 172 7 8 172 7 8 1 2 7 8 1 2 7 8 1 2 7 7 8 5 8 7 8 5 8 7 8 5 8 1 8 4 1 1 8 5 8 1 1 8 5 8 1
29. allow 24 hours Drain condenser and flush with clean water Follow acid manufacturer s instructions TANK REMOVE WATER REGULATING VALVE FINE MESH SCREEN Fig 32 Forced Circulation Method Air Cooled Condenser 50BB units Inspect and clean periodically depending upon operating conditions Follow the service instructions provided for the make of condenser used Charging the System On unit Sizes 008 thru 064 sight glasses are provided at inlet of each expan sion valve These glasses are used in the field charging procedure e gt NOTE Water regulating valve water cooled condenser or condenser airflow air cooled condenser must be properly set before checking system charge UNIT SIZE 50BA004 AND 006 Units are shipped with full operating charge If recharging is necessary l Insert thermometer bulb in insulating rubber sleeve on liquid line near filter drier 2 Add pressure gage to discharge line near compressor 3 After unit conditions have stabilized read head pressure on discharge line gage 4 From standard Pressure Temperature chart for R 22 find equivalent saturated condensing temperature 5 Read liquid line temperature on thermometer then subtract from saturated condensing tem perature The difference equals subcooling temperature 6 Compare the subcooling temperature with the normal temperature listed in the following table If subcooling is low add charge if h
30. ay require cleaning of water deposited scale Condensers are best cleaned with an inhibited hydrochloric acid solution such as Oakite 32 The acid can stain hands and clothing attack concrete and without inhibitor can attack steel Cover surroundings to guard against splashing Vapors from vent pipe are not harmful but take care to prevent liquid from being carried over by the gases Warm solution acts more readily but cold solution is just as effective if applied for a longer period GRAVITY FLOW METHOD Fig 31 Do not add solution faster than vent can exhaust the generated gases 20 When condenser is full allow solution to remain overnight then drain condenser and flush with clean water Follow acid manufacturer s instructions FILL CONDENSER WITH CLEANING SOLUTION DO NOT ADD SOLUTION MORE RAPIDLY THAN VENT CAN EXHAUST GASES CAUSED BY CHEMICAL ACTION FUNNEL I PIPE 016 064 VENT PIPE 5 APPROX 3104 SHELL IN TUBE OR SHELL IN COIL CONDENSER TUBE IN TUBE Fig 31 Gravity Flow Method FORCED CIRCULATION METHOD Fig 32 Fully open vent pipe when filling condenser The vent may be closed when condenser is full and pump Is operating Regulate flow to condenser with a supply line valve If pump is a nonoverloading type the valve may be fully closed while pump is running For average scale deposit allow solution to re main in condenser overnight For heavy scale deposit
31. ce 1 P PE ES 2 64 19 WM NI 024 028 1 64 034 064 w 2 5 15 pror TT Hr MC Se Mr ml Column B shows time delay between compressor starts under normal thermostat cycling For unit Size 016 thru 064 sequence of operation see Table 11 This table is useful in troubleshootine Table 11 Sequence of Operation with Two Step Thermostat 016 064 li 2 THER MOSTAT Calls For Cooling Satisfied 2nd Step 1st Step 2nd Step sake MSS 1 Evaporator Fan i Cooling Tower Pump Motor 5 Crankcase Heater 3 15 Timer Motor 3 T Compressor 3 Air Cooled Cond 2 5 1 on 016 Crankcase Heater 2 81 016 ABE enh A RNC Bama n All Timer Motor 2 Unit Sus 81 on 016 1 Compressor 2 1 on 016 Cap Cont Solenoid on 064 only Liquid Line Solenoid on 016 only atten aur emt Air Cooled Cond 81 034 Crankcase Heater 1 044 3 Timer Motor 1 054 1 Compressor 1 0644 Liquid Line Solenoid 2 Pumpout Relay 2 j Crankcase Heater 2 3 Timer Motor 2 Compressor 2 Cap Cont Solenoid pru BBO64 i Low Pressure Switch 2 Liquid Line Solenoid 1 1 Pumpout Relay 1 Crankcase Heater 1 Timer M
32. e removed Disconnect motor ground wire and remove motor JBA BB028 AND 034 Proceed as follows Remove unit access panel and motor junction box cover Disconnect motor wires and remove conduit connection Remove the 2 motor adjusting screws and the fan belt Slide motor assembly out thru slots in mounting angles BA BB044 THRU 064 To remove motor Remove unit access panel and motor junction box cover Disconnect motor wires and remove conduit connection Remove bolts holding motor mounting plate to channels Back out the motor adjusting screws remove the an belt and slide motor out thru channel lip uides TO REINSTALL MOTORS Reverse the above procedures Align pulleys and adjust belt tension as described in the section Indoor Air Fan Adjustment Pressure Relief Devices The 50BB con denserless units are equipped with a fusible plug type safety relief device on the compressor The relief setting is 197 or 203 F on all units All 50BA water cooled units except Size 50 064 have a frangible disc on each condenser Disc setting is 385 5 psig The 50 064 unit has a condenser pressure relief valve set at 385 psig plus a pressure relief valve on the compressor set at 450 psig Crankcase Heaters are supplied on all 50BB condenserless units and 50BA008 and 064 water cooled units The heater prevents liquid refrigerant from accu mulating in the compressor crankcase during extended s
33. f the FLA for largest motor plus voltage as unit 100 of FLA for al other motors in the unit 1Min Ckt Amps and MOCP Amps values per NEC See Note 1 5 Maximum instantaneous current flow during starting is the sum of the iUnits 44 and 054 have 3 compressors Compressor no 1 data LRA for last compressor to start plus the FLA for all other compressors applies to Systems 1 and 2 compressor no 2 data applies to System 3 in the unit Table 8 Maximum Wire Sizes for Terminal Block AWG or UNIT VOLT 044 0644 064 034 BA BB BA BB BA BB 350 0000 350 350 350 350 500 0000 350 350 00 00 Zi 00 350 350 PHASE 008 012 016 024 208 230 3 00 00 500 93 _ _ O0 575 3 00 Terminal block not supplied 004 and 006 unit sizes Wire size to selected and supply wires to be connected to factory supplied pigtail wire connectors 00 0000 0000 0000 gt Step 16 Make electrical connections circuit breakers Branch circuit must be in accord GENERAL Provide an adequate fused dis ance with NEC or local code whichever takes connect switch per NEC within sight of the unit precedence Power supplied to auxiliary equipment Provision for locking switch open OFF is ad such as fan motors for air cooled condenser or for visable to prevent power from being turned on when cooling tower
34. feature Add refrigerant as follows 50BAO008 2 6 lb 50 012 0 5 Ib On 50BA064 units adding liquid refrigerant to the level of condenser test cock will provide 12 to 5 F subcooling UNIT SIZE 50 008 THRU 064 These units with remote air cooled condensers are shipped with a holding charge only To charge 1 Open suction and discharge line service valves 2 Blow holding charge evacuate and leaktest system 3 Add sufficient refrigerant vapor to permit con tinuous operation after starting unit 4 Start unit per Start Up Section then using standard charging techniques add refrigerant as required to maintain normal operating conditions Use charging chart supplied with condenser If information is not available block off enough of condenser coil to maintain 220 psig discharge pressure and charge to a clear sight glass Return Air Grille Removal 50BA BB004 012 Loosen 2 screws visible thru grille at upper and lower corner of one side Slide grille side frame off unit then slide grille sideways and pull it away from unit To reassemble reverse procedure 55 60 65 70 75 80 85 COMPRESSOR DISCHARGE PRESSURE PSIG COMPRESSOR SUCTION PRESSURE PSIG Temperature Entering Air Fig 33 Charging Chart 50BBOO4 m jm 0 soo BEY z E Wb 1 wwe meque P dcn wo Um P lee rre gaol
35. hutdown periods Heater is automatically energized whenever unit main power is on and compressor is stopped Heater is de energized when compressor starts Do not shut off unit main power supply for an extended period except for servicing unit Turn on power supply for at least the following time interval after an extended shutdown before starting compressor UNIT TYPE SIZE C 50BB004 006 50BAO08 and 064 50BB008 thru 064 Refer to Start Up procedures 1 ae TIME INTERVAL iE EMEN C 7722 24 hrs 2 ibas Gea If SOBA units are installed in unheated rooms they should be equipped with crankcase heaters High and Low Pressurestats Refer to Table 1 for cut in and cutout settings for these safety devices The high pressurestat is located in the electrical panel The low pressurestat is located on top of compressor except as follows 5 008 unit on suction line SOBA BB064 units in electrical panel Time Guard Control Circuit provides automatic reset protection except circuit breaker time delay in starting and controlled cycling 1f compressor shuts down for any reason the control circuit pre vents restart for time periods as follows WP NE UNIT CIRCUIT 50BA BB NO Full ae Delayed Start minutes seconds 008 012 _ 5 um mS v du AME iA Me ces ey
36. igh remove charge sesmeske ue cete e amm Pee ze qe HM Rue HH oe e e e UNT suBCOOUNG 50BA004 25 t2F 50BA006 22 t 2F eee eS Saturated condensing temperature at compressor minus liquid line temperature EXAMPLE Head pressure from gage 220psig Saturated cond temp from chart 108 F Liquid line temp from thermometer 96 F Subcooling by subtraction 12 F charge UNIT SIZE 50BB004 AND 006 Units are shipped with a holding charge only To charge 1 Open suction and discharge line service valves 2 Blow holding charge evacuate and leaktest system 3 Using standard refrigerant charging techniques and the charts which follow Fig 33 and 34 add refrigerant as required to maintain proper operating conditions UNIT SIZE 50BA008 THRU 064 These units with water cooled condensers are shipped with a full operating charge lf recharging is necessary complete charge lost weigh in amount of refrig erant indicated on unit nameplate and Table 1 If unit has partial charge it may be charged with sight glass using standard charging techniques Ad just the water regulating valve to maintain proper saturated condensing temperature 168 226 psig Refrigerant can be added to 50BAO008 and 012 units after sight glass is cleared to take advantage 21 of the condenser subcooling
37. it turn on condenser water supply On 50BB unit open refrigerant line service valves 4 Set selector switch at FAN position Check fan speed Table 1 and rotation Fan direction arrow is attached to fan scroll If fan requires adjust ment refer to Service section entitled Indoor Air Fan Adjustment 5 On 50BA water cooled units set selector switch on COOL and thermostat at lowest setting Compressor will start within 5 minutes On 50BB condenserless units allow crankcase heater to remain energized unit power on for at least 6 8 hours then set selector switch on COOL and thermostat at lowest setting Com pressor will start within 5 minutes 6 Set thermostat at highest setting to shut off compressor 7 Set thermostat at lowest setting Compressor will start within 5 minutes as described in the Service section Time Guard Control Circuit On SOBB remote condenser unit the outdoor air fans cycle with compressor 8 Set thermostat for comfort as desired gt TO SHUT DOWN UNIT Set selector switch at OFF Do not shut off main power except to service unit Crankcase heater 50BB unit is operative only when unit power is on see Service section Crank case Heaters Unit Size 50BA BBOOS thru 064 1 Thoroughly clean and inspect unit 2 Open compressor discharge and suction service valves and liquid shutoff valves 3 With selector switch in OFF position turn circuit breakers on 50BAO008 and 0
38. ith fasteners provided then on 028 and 034 units reposition and fasten the filter frame moved in Step 14 4 Install the following per Installation Step 7 a Motor mounting frame angles b Motor on motor plate assembly c Motor plate assembly on frame angles d Balance of drive package components MOTOR MOUNTING ANGLES 2 ADJUST NG dbz SCREW Fig 7 054 and 064 Vertical Fan Motor Mounting Angles Fig 6 028 and 034 Horizontal Fan Motor Mounting Angles a eS a a Fig 8 Fan Motor Mounting Detail 50BA BB054 and 064 MOTOR 50BA BB 028 034 HOLES FOR ADJUSTING MOUNTING PLATES 50BA BB 054 064 Fig 9 Motor Mounting NOTE On 044 units motor mounting plate and channels are factory installed within fan section No angle frame plates or fasteners are necessary In this e position motor is on right side of fan section E 5 Adjust the following per Installation Step 8 Fan wheel alignment Shaft alignment Pulleys Fan belts 5 SUPPORT CHANNEL 2 PLATE 8 WASHER WELD NUT 3 ie Iz LG ROLL PIN MOTOR MOTOR WP ADJUSTING SUPPORT SUPPORT SCREW ANGLE CHANNEL Fig 10 Assembled Fan Motor Adjusting Screw 6 Replace panels as follows a Rear coil section panels front and rear fan section panels b All end panels Step 7 I
39. motor power connections 5 Adjust the following items per Installation Step 8 a Shaft alignment b Fan wheel position c Pulleys d Fan belt 6 Replace panels as follows a Upper rear coil section panel on top of coil section and fasten b Rear fan section panel on top of fan section and fasten UNIT SIZES 50BA BB028 THRU 064 are shipped in sections as noted previously They can be field assembled for either vertical or horizontal discharge NOTE Fan section panels may be removed for easier lifting and to facilitate motor installation To set up Sizes 50BA BB028 thru 064 for horizon tal discharge Fig 4 and 5 proceed as follows l Remove a Upper rear and end panels of coil section b End panels on fan section c Fasteners holding lower rear edge of fan panel gt 2 Lift and position fan section on rear of coilsection Fig 4 Secure with fasteners provided 3 Install the following per Installation Step 7 a Motor mounting frame angles b Motor on plate assembly c Motor plate assembly on frame angles d Balance of drive package components 4 Adjust the following per Installation Step 8 Shaft alignment b Fan wheel position c Pulleys d Fan belts S VERTICAL DISCH TOP MOUNTED FAN MOTOR POSITION HORIZONTAL DISCH VERTICAL DISCH 044 SIZE ONLY NOTE MOTOR POSITION HORIZONTAL DISCHARGE BACK MOUNTED AIRFLOW FRONT FILTER RACK COIL SECTION COMPRESSOR
40. n until tight 4 Retighten locking collar setscrews CUTOFF CLEARANCE Unit Sizes 044 054 and 064 After centering and aligning the fan wheel loosen cutoff sheet Fig 13 adjust for 1 1 4 in clearance as shown and then tighten securely FAN PULLEY AND BELT ADJUSTMENT Refer to the Service section entitled Indoor Air Fan Adjustment PILLOW BLOCK FAN SHAFT BEARING SHAFT EXTENSION LONGER ON ONE END TO ACCOMMODATE DRIVE PULLEY HOLLOW SHAFT 3 FANS ON 028 064 BEARING LOCKING COLLAR 2 SET SCREWS SHIM IF NECESSARY Fig 15 Horizontal Shaft Alignment Step 9 Install heating coil if supplied On 50 004 and 006 units any water or steam heating coil must be installed thru the back of the unit as described in the Installation Instruc tions shipped with the accessory coil Step 10 Install supply air evaporator ductwork Connect supply ducts to flanges on air supply opening Fig 1 using a flexible connection Attach ductwork to building structure and insu late with fiberglass and vapor barrier to prevent sound transmission and vapor condensation Weatherproof external ductwork joints and openings with flashing and mastic in accordance with applicable codes Ducts passing thru an unconditioned space must be insulated and covered with a vapor barrier 11 Step 11 Install return air ductwork 004 012 units The unit back panel is stamped to indicate alter nate
41. n shaft bearings on 50BA BBO004 thru 034 units are lubricated for the life of the bearings The 50BA BB044 054 and 064 units have alemite grease fittings Lubricate annually with a good grade of mixed base grease or lithium base grease with rust inhibitor Add grease until air bubbles form under the seal Do not overgrease Return Air Filters Inspect filters twice monthly and replace as often as required by operating condi tions Filter size and type are listed in Table 1 If cleanable filters are used flush them with hot water or steam or soak them in a mild water solu tion of soap or detergent Refer to filter manu facturer s instructions as applicable Do not operate the unit at any time without return air filters in place For access to filters refer to the Service sections entitled Access Panel Removal and Return Air Grille Removal as required Condensate Drains Clean the drain line and unit drain pan at the start of each cooling season Check flow by pouring water into drain Be sure trap is filled as shown in Fig 26 to maintain an air seal Evaporator Coil Observe fan compartment CAUTION note at the beginning of the SERVICE section Remove dirt and debris from evaporator coil as required by condition Clean coil with a stiff brush vacuum cleaner or compressed air Usea fin comb of the correct fins in spacing Table 1 when straight ening mashed or bent coil fins Water Cooled Condenser 50BA units m
42. nstall fan motor This step applies to unit Sizes 50BA BB028 034 054 and 064 Install items after fan section frame been placed in position on coil section NOTE Place plywood over evaporator coil to pre vent damage while installing motor and mounts To install motor 1 Fasten motor mounting angle bracket to fan sec tion Use Fig 4 or 5 for position reference and Fig 6 7 and 8 for assembly guidance Be sure that lips of angle brackets are around fan section frame and that slots for motor mounting plate face each other On Sizes 50BA BB054 and 064 align bearing support bracket holes with holes in motor mounting bracket Fasten with bolts flat washers lock washers and nuts as shown in Fig 8 2 Position motor on motor plate Fig 9 and fasten with fasteners provided 3 Lift motor plate assembly and slide into motor mounting angles as shown in Fig 6 Plate fits into angle slots On vertical mounts the motor frame assembly may be lowered to the bottom of the support angle channels 4 Assemble and install motor adjusting screws as shown in Fig 10 Drive roll pins into screws to prevent screws from backing out during motor position adjustment 5 Adjust motor position Fasten motor mounting plate to mounting angles Table 2 Alternate Fan Motors and Drives UNIT NEMA 50BA FRAME Hp BB SIZE EA T Min 004 56 3 4 15 7 oo6 56 154 008
43. otor 1 i Compressor 1 Low Pressure Switch 1 S SU HRS NOTES 1 If compressor operation is interrupted by protective devices or a When used power failure timer motor will run 4 min 45 sec or 6 min 5 sec TExcept 50 064 before above cycle can be repeated 119 sec 044 054 only 2 When liquid line solenoid 016 or capacity control solenoid 6 min 5 sec 044 054 only 064 is energized it allows refrigerant to flow to complete coil 23 For replacement items use Carrier Specified Parts Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Book 1 4 Form 50BA BB 9S Supersedes 5 85 PrintedinU S 7 81 PC111 Catalog No 535 017 Tab 2 7
44. pstream from the indoor air fan Always assume the worst conditions such as having return air filters clogged with dirt Referring to Fig 26 Differential must be equal to or larger than negative static pressure at design operating conditions Store enough water in trap to prevent losing seal Differential 2 This differential must be equal to or larger than one half the maxi mum negative static pressure When the fan starts Differential 3 is equal to the maximum negative static pressure Do not use drain line smaller than size listed in Table 6 If required cut hole in panel for drain line Pitch drain downward toward an open drain sump Provide a trap at least 3 in high with plugged tee for cleaning Fill trap with water to make an air seal Observe all sanitary codes Table 6 Condensate Drain Connections fp SNE eee TRUNCATE LES ges itte M 004 006 UNIT SIZE 000012 016 024 E PIPE SIZE 3 4 1 1 1 2 COOLING DRAIN PAN DIFFERENTIAL 1 FAN RUNNING AND CONDENSATE DRAINING DIFFERENTIAL 2 FAN OFF _ TRAP CONDITION D WHEN FAN STARTS Ea Table 7 Electrical Data COMPRESSOR NO 1 a COMPRESSOR NO 2 NODE PS ix xo sch eee ENSA T INDOOR UNIT FAN MOCP VOLTS PH H2 LRA MOTOR Amps eae BB Hp FLA 230 1 60 33 45 004 208 230 3 60 33 30 _ 60 3 60 08 15 230 1 60 53 90 006
45. representative On 5 016 thru 064 units a field supplied thermostat must be installed Fig 28 Table 9 lists the recommended connecting sequence for a 2 step thermostat Table 9 Two Step Thermostat Connection for Capacity Control THERMO TERMINAL COMPONENT STEP CONN _ 2 2 Compressor Two u R5 Liquid line solenoid MR One 3 Compressor No 2 Two 2 Compressor No 1 044 One 5 Compressor 2and 3 Two 2 Compressor No 1 Capacity control solenoid valve and liquid line Ong Lande solenoid valve No 2 compressor No 2 TWO 2 Liquid line solenoid No 1 and compressor No 1 A FREEZE PROTECTION THERMOSTAT An accessory freeze protection thermostat is required on Size 008 012 and 064 units when the low pressure switch setting Table 1 is lowered or when a liquid line low pressure switch is installed for intermediate or cold weather operation Installation instructions are shipped with the thermostat HEATING COILS Accessory heating coils are available for field installation Separate installation instructions are shipped with the accessory e START UP Unit Size 50BA BB004 and 006 1 Set selector switch at OFF and thermostat at highest setting 2 Turn on unit power On 50BB units check that crankcase heater is on Compressor shell in vicinity of heater should become warm to the touch 3 On 50BA un
46. sen movable pulley flange setscrew Fig 30 4 Screw movable flange toward fixed flange to increase fan speed and away from fixed flange to decrease speed using values shown in Table 1 Increasing fan speed increases load on motor Do not exceed maximum allowable fan speed Table 1 or motor full load amps indicated on motor nameplate and Table 7 5 Set movable flange setscrew at nearest flat of pulley hub and tighten setscrew 6 Check Pulley Alignment and Belt Tension Ad justment as described below 7 Check fan operation Repeat above procedure as required PULLY ALIGNMENT Sh slide fan pulley along fan shaft Make angular align ment by loosening motor from mounting bracket See Fig 30 BELT TENSION ADJUSTMENT Shut off ply Loosen fan from bracket Do not loosen motor mounting bracket from unit Move fan motor up ordown until proper belt tension is achieved approximately 3 4 in deflection with 8 Ib tension at midpoint of belt span Indoor Air Fan Pulley Adjustment Lubrication Observe fan compartment CAUTION note The fan motor bearings are factory lubricated and will need no lubrication for the first 5 years of opera tion 3 years at continuous service or excessively dirty conditions Inspect bearings and relubricate or replace as required If heating coil is installed oil bearings every 6 months Follow lubrication instructions on special field supplied motors Fa
47. urge one line at a time using holding charge in base unit 6 Tighten nuts to stop on unit fitting collar 7 Open all service valves Make sweat connections as follows 1 Clean tube then remove plug and nut from fitting 2 Remove O ring from inside fitting with bent pin 3 Wrap entire valve with wet rag 4 Bottom tube in fitting and apply low temperature solder such as Allstate 430 If specified install field supplied water regulating valve in water supply line outside cabinet as follows 1 Route the regulating valve capillary with its flare nut to the fitting on refrigerant liquid line Fig 2 using any convenient unused opening on side of unit Use a grommet in unit panel to prevent chafing of capillary Table 4 Maximum Water Side Working Pressure 1 MAXIMUM WORKING _ UNIT SIZE 50BA PRESSURE 004 006 008 012 450 psig 016 550 psig 024 028 034 044 054 150 psig 064 250 psig 550 psig if factory installed dresser adapters are removed and field fabricated manifold is installed A M 3 FPT CONDENSATE DRAIN 0 FPT WATER OUT oat Sper 7 53 5 8 DRAIN 1 WATER IN 2 Remove cap from liquid line fitting 3 Remove cotter pin taped to liquid line near fitting Insert pin split end first into water regulating valve flare nut 4 Connect flare nut to fitting Round end of cotter 6 pin will depress core of fitting
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